The DK-crush has been demonstrated as a safe and efficient procedure, which can effectively elevate the success rate of final kissing balloon inflation (FKBI) and reduce long-term major adverse cardiac events (MACE). However, in the clinical real world, especially when the bifurcation angle was relative small or parallel, the DK-crush still has several limitations: (1) although initial kissing balloon inflation (IKBI) can push away the struts covering the side-branch ostium and remold the geometric shape of orifice, redundant struts will be crushed aside onto parent-vessel wall and the side-branch ostium, thereby inducing turbulent flow due to local unsmooth vessel lumen; (2) once the main-vessel stent was released, the side-branch orifice will be squeezed crushed again, thus resulting in stent deformation, malapposition or incomplete coverage near the bifurcation arena and carina; (3) because of deformation or crush of the side-branch stent at its ostium, rewiring the side-branch may be extremely hard with subsequent balloon passing difficulty, leading to low quality or failure of FKBI, or sometimes stent destruction as the wire runs out of the stent.